[issue26801] Fix shutil.get_terminal_size() to catch AttributeError

[Emanuel Barry]

Emanuel Barry added the comment:

On posix-based OSes, `os.get_terminal_size` might not exist ( https://hg.python.org/cpython/file/default/Modules/posixmodule.c#l12462 ), so this is needed.

New patch file with tests included.

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Added file: http://bugs.python.org/file42522/get_term_size_with_test.patch

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